Add GrSurface parent class above GrTexture & GrRenderTarget

http://codereview.appspot.com/6297092/



git-svn-id: http://skia.googlecode.com/svn/trunk@4292 2bbb7eff-a529-9590-31e7-b0007b416f81
diff --git a/src/gpu/GrSurface.cpp b/src/gpu/GrSurface.cpp
new file mode 100644
index 0000000..3fd90d9
--- /dev/null
+++ b/src/gpu/GrSurface.cpp
@@ -0,0 +1,11 @@
+/*
+ * Copyright 2012 Google Inc.
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "GrSurface.h"
+
+SK_DEFINE_INST_COUNT(GrSurface)
+